Sterling silver coquina foxtail small oval necklace n749 this uniquenecklace is part of our popular foxtail collection and features a cushion shaped cabochon of coquina coquina is a rare natural gemstone sourced from the caribbean island of barbados formed over millions of years each coquina stone is unique composed of thousands of layers of compressed sediment and fossilized coralsthe stone is framed in intricately woven sterling silver foxtail chain that hangs gracefully around the neck